Android 3.0 Application Development Cookbook by Merrifield Mew Kyle

By Merrifield Mew Kyle

The publication is written in a cookbook type, providing examples within the form of recipes, permitting you to move on to your subject of curiosity, or stick to issues all through a bankruptcy to realize in-depth wisdom. when you are new to Android program improvement and searching out a brief commence, or while you're an skilled Android developer trying to find a reference consultant, then this ebook is for you. preferably, you might want to recognize a few Java and a bit approximately mark-up languages yet this is often on no account helpful. This booklet will educate you ways to jot down wealthy Android functions from scratch very quickly.

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OnSaveInstanceState(state); } 7. getString(KEY)); } 8. Run the project on a device or emulator. Enter some text into the EditText view and click on the button. Then restart the activity by exiting and restarting or by rotating the handset. When the activity begins afresh, the TextView restores to its remembered state. 22 Chapter 1 How it works... The way these state saving methods work is really quite simple. When our application is dropped from memory, a Bundle of name/value pairs can be stored with the onSaveInstanceState() method.

ToString); } }); 5. Now is a good time to import any libraries. OnClickListener. View. 6. onSaveInstanceState(state); } 7. getString(KEY)); } 8. Run the project on a device or emulator. Enter some text into the EditText view and click on the button. Then restart the activity by exiting and restarting or by rotating the handset. When the activity begins afresh, the TextView restores to its remembered state. 22 Chapter 1 How it works... The way these state saving methods work is really quite simple.

7. Open the manifest file and include a new element underneath the one that is already there. MyNewActivity" android:label="my new activity"> 8. Run the application on a device or an emulator. A small pop-up appears in the initial activity that has been passed from the called one: How it works... Here, the called activity used setResult() to return a result code back to the calling activity. We used an arbitrary value in our example but a result code can be used to represent an outcome such as the index of a selected item.

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